Parent guides · Weeks 18 to 22
Your fifth month of pregnancy, day by day
Days 126 to 160: hearing begins, the anomaly scan, quickening, vernix, the halfway mark, back and pelvic aches, and iron, with one thing to try every day.
Days count from the first day of your last period, the way your provider counts them, so conception is day 14 and your due date is day 280. Every note cites public health sources (the NHS, the CDC, the NIH, and the Office on Women’s Health), and a scan can move your dates: read each day as “around now”, and let your own provider’s read of your pregnancy beat any note.
← Your fourth month of pregnancy, day by day (days 98 to 125)Your sixth month of pregnancy, day by day (days 161 to 195) →
Week 18: hearing
The ears tune in, the anomaly scan, and talking to the bump.
Day 126The anatomy scanEighteen weeks: the big scan is coming. What it checks, what it can and can't find, and the three questions worth asking before the gel goes on.Try: The anatomy-scan questions- Day 127ClumsyDropping things, catching your hip on the counter: the bump moves your balance. Today you fix one trip hazard and learn what to do if you fall.Try: The trip-hazard sweep
- Day 128To find out or notThe scan can often tell you the sex. Today you and your partner decide whether you want to know, and who else gets told.Try: The find-out-or-not talk
- Day 129The dark lineA brown line down the middle of your belly, darker patches on your face: normal, hormonal, and temporary. Today you note it and get on with your day.Try: The dark-line note
- Day 130Talk to the bumpYour baby's hearing is developing, and they may move more when you rub your tummy and talk. One minute today, hand on bump, out loud.Try: The tummy-talk minute
- Day 131One leg, not twoTwo puffy ankles at the end of the day is common. One swollen, painful calf is a phone call today. Learn the difference once and keep it.Try: The one-leg rule
- Day 132The partner's playlistHearing is developing and loud music may get a wriggle. Today the partner picks three songs for the bump, and we talk about finding a way in.Try: The partner's playlist
Week 19: vernix
The waxy coat, quickening for many, and the belly's new center of gravity.
Day 133Looser jointsNineteen weeks. A hormone called relaxin is loosening your ligaments, so running may start to hurt. Today you swap one run for a swim or a brisk walk.Try: The exercise swap- Day 134Twenty-one weeks to goNineteen weeks and one day. The NHS counts about 21 weeks to the birth. Today you write the five things you want done by then, and give each a week.Try: The halfway countdown
- Day 135Back and pelvisNineteen weeks and two days. Pelvic pain and backache are on this week's list. Today: bend your knees, a pillow between them tonight, and a ten-minute walk.Try: The back-care routine
- Day 136The snack upgradeNineteen weeks and three days. The UK and US disagree on extra calories right now, and agree on what they should be. Today you swap one snack.Try: The snack upgrade
- Day 137Lie still and listenNineteen weeks and four days. That bubbling low in your belly may be your baby. Today: fifteen minutes on your side after a meal, phone away, just noticing.Try: The quiet lie-down
- Day 138CrampNineteen weeks and five days. Leg cramps join the list around now; tonight's job is a calf stretch at the wall, and knowing what to do when one hits at 3 a.m.Try: The cramp stretch
- Day 139NosebleedsNineteen weeks and six days, the last week measured head to bottom. Today: the nosebleed nobody warned you about, and a bedside kit that costs almost nothing.Try: The nosebleed fix
Week 20: halfway
Six inches and nine ounces, the scan done, and the next twenty weeks.
Day 140HalfwayTwenty weeks. Half of a forty-week calendar, a baby the size of a banana, and a short letter to write and seal for the due date.Try: The halfway letter- Day 141Head to heelTwenty weeks and one day. Last week 15.3 cm, this week 25.6: why the number jumped, and a tape measure on the kitchen table to see it.Try: The tape-measure moment
- Day 142Preeclampsia, from nowTwenty weeks and two days. Preeclampsia can start after week 20. Today you put its four warning signs on one card, with two words under them: call now.Try: The preeclampsia primer
- Day 143Preterm labor, from nowTwenty weeks and three days. Some tightenings through the day are normal; six or more in an hour are not. Today the preterm labor signs go on your card.Try: The six-in-an-hour rule
- Day 144The cervix-length questionTwenty weeks and four days. Many women have their cervix measured by ultrasound between 20 and 24 weeks. Today you write down one question to ask about it.Try: The cervix-length question
- Day 145Your baby's normalTwenty weeks and five days. There's no magic number of kicks; what matters is a change. Today you start learning when your baby is usually busiest.Try: The movement baseline
- Day 146The paperwork folderTwenty weeks and six days. Letters, results, work forms, vaccine dates: today they all go in one folder that both of you can find.Try: The paperwork folder
Week 21: a sleeping and waking baby
Swallowing, a sleep-wake rhythm, heartburn, and leg cramps.
Day 147Heavier than the placentaTwenty-one weeks. Your baby now outweighs the placenta, and your balance is shifting. Today you write a three-line plan for a fall.Try: The fall plan- Day 148PilesTwenty-one weeks and one day. Up to half of pregnant women get hemorrhoids. Today you put together a small kit, and learn when blood means a call.Try: The hemorrhoid kit
- Day 149If the scan news was hardTwenty-one weeks and two days. If the anomaly scan raised a question, today is about the next conversation: who to see, who comes, and what to ask.Try: The results conversation
- Day 150A seat for the partnerYour baby can hear voices from outside the womb now. Today the partner books their own seat at the antenatal class, or a session of their own.Try: The partner's class seat
- Day 151HomemadeNo extra calories yet, but better ones. Today one takeaway night becomes a simple home meal, and the recipe gets kept.Try: The takeaway swap
- Day 152Awake and asleepTwenty-one weeks and five days. Your baby is settling into times of waking and sleeping. For a week, you note their busiest hour, and get some rest yourself.Try: The pattern log
- Day 153Read a page aloudTwenty-one weeks and six days. Your baby can hear voices from outside the womb now. Tonight, each of you reads one page aloud, about anything at all.Try: The read-aloud page
Week 22: eyebrows and lashes
Lanugo everywhere, a heartbeat by stethoscope, and iron and anemia.
Day 154A wellbeing planTwenty-two weeks. The NHS suggests a wellbeing plan this week. Today you write yours on one page: what helps, what doesn't, and who you'd call.Try: The wellbeing plan- Day 155TasteTwenty-two weeks and one day. Your baby's taste buds are developing. For one week, try a different vegetable or herb each day, for the variety and the fun.Try: The flavour week
- Day 156The immediate listTwenty-two weeks and two days. Severe pain, bleeding, fluid: three things that mean a call right away. Today they go on one card on the fridge.Try: The immediate-call list
- Day 157Itch without a rashTwenty-two weeks and three days. About 20 percent of pregnant women feel itchy. Most of it is skin stretching; one kind is worth a call. Today you learn the difference.Try: The itch-without-rash rule
- Day 158A stethoscopeTwenty-two weeks and four days. Your baby's heartbeat can now be heard through a stethoscope, so at your next visit, ask to listen.Try: The stethoscope ask
- Day 159The glucose test is comingMost women are screened for gestational diabetes between 24 and 28 weeks. Today you find out which test you'll have and whether to fast.Try: The glucose-test preview
- Day 160Looking ahead to month sixThe last day of your fifth month. Today you read ahead: the glucose test, a first birth plan, and when to tell work, each with a week beside it.Try: The month-six preview